Much faster.Totally automatic, extremely easy to use.Optimized for daily use.Disk optimization, several strategies.Directories are moved to the beginning of the disk.Reclaims MFT reserved space after disk-full.Maintains free spaces for temporary files.Can defragment very full harddisks.Can defragment very large files.Can defragment individual directories and files.Can be run automatically with the Windows Scheduler.Can be used from the commandline.Can be used as a screen saver.Can be run from cdrom or memory stick.